There have been
many models and "styles" of Atmos Clocks
produced by Jaeger-LeCoultre since the late 1930's;
however at this time there is no known Atmos Clock
reference book that lists all Atmos models and their
respective serial numbers.

On this page, you will
find photos of the most common models of Atmos Clocks
- such as those with Gold Plated Brass cases and
glass sides; you'll also find photos of some very
unique and rare models, including those with Wood
or Marble Cases, Oriental Motif Atmos Clocks and
some very rare and different Atmos clocks.

The first set of photos
below include all main "Calibers" of Atmos
Clocks, those being:
Caliber # 1 (original Reutter Atmos), Atmos II,
519, 522, 526, 528-6, 528-8 and Caliber 540, respectively.

A "Caliber Number"
- such as Caliber 528, 540, etc, are numbers that
we use to determine the movement *type* of an Atmos
and not necessarily the style of the case.

The Serial Number
of an Atmos Clock is usually located on the top
of the Movement, by the Speed Adjustment Lever.
On some very older models, the serial number may
actually be on the front of the Movement -near the
hands and on Antique Reutter Clocks the serial number
is often on the Back "Drum" portion.

If
you're trying to determine the Model/Caliber number
of your Atmos, the first set of photos below should
be of help:

Click
any picture for an enlargement

Original
Atmos I
Mercury Bellows Model

Atmos II/Caliber
II

Atmos Caliber
519

Atmos Caliber
522

Atmos Caliber
526

Atmos Caliber
528-6

Atmos Caliber
528-8

Atmos Caliber
540

Aside
from the different Cases and Dials, the
Pendulum on an Atmos Clock
can also be different from one model to
the next.

For Example:
The Pendulum of an "Atmos Caliber II"
has straights, black lines (see
photo), the Pendulum of a Caliber
519 has round "dimples", the Caliber
526 has wide vertical indentations and the
Caliber 528 has thin vertical indentations.

Click picture for
enlargement

Note that the Pendulum
of an Atmos 540 (newer models) may have either
thin vertical indentations or round dimples,
depnding on the model.